Good quality with cheap price.

Product Name: PVC Rectangle Mouse PadModel Number: SK.P210Place of Origin: ChinaGood quality with cheap price.

Speaker Dimension: 15mm dia.Impedance: 32 OhmsSensitivity: 108dB S.P.L. at 1KHzFrequency Response: 20Hz-20,000HzRated Power: 3mWPower Capability: 30mWCable Length: Approx. 0.8mPlug Type: 3.5mm Stereo

Product Name: Simple Desktop MicrophoneModel Number: SK007Place of Origin: ChinaMicrophone Unit: 6X5 mm Dia. Electret condenserMicrophone Directivity: Omni DirectionSensitivity: -58dB +-3dBStandard Op

HEADPHONE SECTION:Speaker Dimension: 27mm dia.Impedance: 32 OhmsSensitivity: 105dB S.P.L. at 1KHzFrequency Response: 20Hz-20,000HzRated Power: 15mWPower Capability: 150mWCable Length: Approx. 2M +-0.3

HEADPHONE SECTION:Speaker Dimension: 27mm dia.Impedance: 32 OhmsSensitivity: 105dB S.P.L. at 1KHzFrequency Response: 20Hz-20,000HzRated Power: 15mWPower Capability: 150mWCable Length: Approx. 2M +-0.3

TransmitterWorking Frequency: 49-50MHzPower Supply: DC 12VTransmitting Distance: 40 metersOperating Current: 50+-10mAFrequency Response: 30Hz-18KHzS/N Ratio: >=50dBAccessory: 6.3mm stereo plug convert

HEADPHONE SECTION:Speaker Dimension: 36mm dia.Impedance: 32 OhmsSensitivity: 103dB S.P.L. at 1KHzFrequency Response: 20Hz-20,000HzRated Power: 15mWPower Capability: 150mWCable Length: Approx. 2.5M +-0

Good quality with cheap price.